ABB RET670 - Page 78

Table 66. General current and voltage protection CVGAPC , continued
Function Range or value Accuracy
Independent time delay, undervoltage at 1.2 to 0.8 x U
set
, step 1 -
2
(0.00 - 6000.00) s ±0.2% or ±35 ms whichever is
greater
Overvoltage:
Start time at 0.8 to 1.2 x U
set
Min. = 15 ms
Max. = 30 ms
-
Reset time at 1.2 to 0.8 x U
set
Min. = 15 ms
Max. = 30 ms
-
Undervoltage:
Start time at 1.2 to 0.8 x U
set
Min. = 15 ms
Max. = 30 ms
-
Reset time at 1.2 to 0.8 x U
set
Min. = 15 ms
Max. = 30 ms
-
Overvoltage:
Inverse time characteristics, see table 120 4 curve types See table 120
Undervoltage:
Inverse time characteristics, see table 121 3 curve types See table 121
High and low voltage limit, voltage dependent operation, step 1 - 2 (1.0 - 200.0)% of UBase ±1.0% of U
r
at U ≤ U
r
±1.0% of U at U > U
r
Directional function Settable: NonDir, forward and reverse -
Relay characteristic angle (-180 to +180) degrees ±2.0 degrees
Relay operate angle (1 to 90) degrees ±2.0 degrees
Reset ratio, overcurrent > 95% -
Reset ratio, undercurrent < 105% -
Reset ratio, overvoltage > 95% -
Reset ratio, undervoltage < 105% -
Overcurrent:
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Impulse margin time 15 ms typically -
Undercurrent:
Critical impulse time 10 ms typically at 2 to 0 x I
set
-
Impulse margin time 15 ms typically -
Overvoltage:
Critical impulse time 10 ms typically at 0.8 to 1.2 x U
set
-
Impulse margin time 15 ms typically -
Undervoltage:
Critical impulse time 10 ms typically at 1.2 to 0.8 x U
set
-
Impulse margin time 15 ms typically -
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
78 ABB